Rotax 125 MAX evo - Crankcase

BRP-Rotax
REPAIR MANUAL
Chapter: Chapter 5
CRANKCASE
TOPICS IN THIS CHAPTER
System description .................................................................................................................................2
Removal of the crankcase .......................................................................................................................5
Drain oil ................................................................................................................................................5
Remove water pump and compensating wheels..................................................................................6
Disassembling the crankcase..................................................................................................................9
Removing bearing and oil seal for shaft ............................................................................................ 11
Installation of the crankshaft repair kit ..................................................................................................15
Disassembling of the crankshaft ...........................................................................................................15
Inspection of the crankshaft..................................................................................................................19
Crankshaft not in specification ..............................................................................................................21
Crankshaft - assembly .........................................................................................................................22
Crank case inspection ...........................................................................................................................26
Inspection of water pump drive .............................................................................................................26
Inspection of water pump shaft .............................................................................................................27
Inspection of balance shaft drive...........................................................................................................27
Inspection of balance shaft...................................................................................................................28
Inspection of the housing halves ...........................................................................................................29
Crank case - assembly ..........................................................................................................................30
Installation of oil seal, ball bearing and needle bushing...........................................................................30
Installation of Ball bearing and oil seal for crankcase ..............................................................................32
Assembly of crankshaft, water pump shaft and balance shaft..................................................................35
Assembly of the crankcase...................................................................................................................36
Installation of crankcase assy. ..............................................................................................................37
Installation of balance and water-pump shaft drive .................................................................................37
Contents This chapter describes the disassembly and assembly of the crankcase of the ROTAX®
125 MAX evo (incl. Junior-, Mini-, Micro MAX evo) engine.
Effectivity: 125 MAX evo, Junior MAX
evo, Mini MAX evo, Micro MAX evo
Edition - February 01 2018 /Rev. 0
Chapter 5
Page 1